//
// Created by huili on 2022/2/21.
//
#include <stdio.h>
#include <string.h>

#define   MAXTITL 40
#define   MAXAUTL 40
#define   MAXBKS 100
char *s_gets(char *st, int n);

struct book {
    char title[MAXTITL];
    char author[MAXAUTL];
    float value;
};

int main_test() {
    struct book library[MAXBKS];
    int count = 0;
    int index;

    printf("Please enter the book title.\n");
    printf("Please  [enter] at the start of a line to stop.\n");

    while (count < MAXBKS && s_gets(library[count].title,MAXTITL) != NULL
    && library[count].title[0] != '\0')
    {
        printf("Now enter the author.\n");
        s_gets(library[count].author,MAXAUTL);
        printf("Now enter the value\n");
        scanf("%f",&library[count++].value);
        while (getchar() != '\n'){
            continue;
        }
        if(count < MAXBKS){
            printf("Enter the next title.\n");
        }
    }
    if(count > 0){
        printf("Here is the list of your books:\n");
        for (index = 0; index < count; index++) {
            printf("%s by %s: $%.2f\n",library[index].title);
            library[index].author,library[index].value;
        }
    } else{
        printf("No books? Too bad.\n");
    }
    return 0;
}

char *s_gets(char *st, int n) {
    char *ret_val;
    char *find;

    ret_val = fgets(st, n, stdin);
    if (ret_val) {
        find = strchr(st, '\n');
        if (find) {
            *find = '\0';
        } else {
            while (getchar() != '\n') {
                continue;
            }
        }
    }
    return ret_val;
}
